In the packaging and other industries have a very wide range of applications, now mainly for foreign applications more, with the rise of various industries in recent years, especially the ISO industry requirements factors, the pursuit of product packaging, transportation process integrity, The use of aluminum alloy boxes has also increased.The heat sink is a device for dissipating heat to the heat-producing electronic components in an electric appliance, and is mostly made of aluminum alloy, brass, or bronze plate-like, sheet-like, multi-sheet, etc., such as CPU CPU in the computer to be used quite large Heat sinks, TV power tubes, line tubes, and amplifier tubes in power amplifiers all use heat sinks.